System and method for separating air gases at low pressure
AssigneeL'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
InventorBenoit Davidian
Life of this patent
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Abstract
An air gas separation plant comprising, in the direction of circulation of the air stream: a compression means that makes it possible to compress the air stream to a pressure P1 of between 1.15 bar abs and 2 bar abs, an adsorption unit of TSA type, and a cryogenic distillation unit, with the adsorption unit comprising at least two adsorbers A and B each having a parallelepipedal casing arranged horizontally and comprising: an air stream inlet and an air stream outlet, a fixed bed adsorbent mass, likewise of parallelepipedal shape, the faces of which are parallel to the faces of the casing; and a set of volumes allowing the air stream to pass through the adsorbent mass horizontally, over the entire cross-section and throughout the entire thickness thereof.
Claims15
An air gas separation plant comprising, in the direction of circulation of the air stream:
- a) a compressor configured to compress the air stream to a pressure P1 of between 1.15 bar abs and 2 bar abs;
- b) a cryogenic distillation unit;
- c) an adsorption unit of TSA type comprising at least two adsorbers A and B each having a parallelepipedal casing arranged horizontally,
- wherein the adsorption unit further comprises:
- an air stream inlet and an air stream outlet;
- a fixed bed adsorbent mass, likewise of parallelepipedal shape, the faces of which are parallel to the faces of the casing;
- and
- a set of volumes allowing the air stream to pass through the fixed bed adsorbent mass horizontally, over the entire cross-section and throughout the entire thickness thereof,
- wherein the set of volumes comprises:
- a first volume V1 for the introduction and distribution of the air stream;
- a second volume V2 comprising the adsorbent mass;
- and
- third volume V3 for recovering the purified air stream;
- wherein the first volume, the second volume, and the third volume are contiguous and in fluidic communication via the faces they have in common.
An air gas separation plant comprising, in the direction of circulation of the air stream:
- a) compressor configured to compress the air stream to a pressure P1 of between 1.15 bar abs and 2 bar abs;
- b) cryogenic distillation unit:
- c) an adsorption unit of TSA type comprising at least two adsorbers A and B each having a parallelepipedal casing arranged horizontally,
- wherein the adsorption unit further comprises:
- an air stream inlet and an air stream outlet;
- a fixed bed adsorbent mass, likewise of parallelepipedal shape the faces of which are parallel to the faces of the casing;
- and
- a set of volumes allowing the air stream to pass through the fixed bed adsorbent mass horizontally, over the entire cross-section and throughout the entire thickness thereof,
- wherein the adsorption unit comprises N pairs of adsorbers where N≥1, each pair comprising an adsorber A and an adsorber B which are positioned contiguously so as to form a single parallelepiped,
- wherein each pair of adsorbers comprises an adsorber A in adsorption mode and an adsorber B in regeneration mode, with all the adsorbers in adsorption mode operating in parallel and all the adsorbers in regeneration mode operating in parallel.
An air gas separation plant comprising, in the direction of circulation of the air stream
- a compressor configured to compress the air stream to a pressure P1 of between 1.15 bar abs and 2 bar abs;
- b) a cryogenic distillation unit;
- c) an adsorption unit of TSA type comprising at least two adsorbers A and B each having a parallelepipedal casing arranged horizontally,
- wherein the adsorption unit further comprises:
- an air stream inlet and an air stream outlet;
- a fixed bed adsorbent mass, likewise of parallelepipedal shape, the faces of which are parallel to the faces of the casing;
- and
- a set of volumes allowing the air stream to pass through the fixed bed adsorbent mass horizontally, over the entire cross-section and throughout the entire thickness thereof,
- wherein the adsorption unit comprises N pairs of adsorbers where N≥1, each pair comprising an adsorber A and an adsorber B which are positioned contiguously so as to form a single parallelepiped,
- wherein the casing of the adsorber A and/or of the adsorber B comprises:
- a length L of between 2 and 15 meters;
- a height H of between 1 and 3 meters;
- and
- a width 1 of between 0.5 and 3 meters, preferably of between 0.8 and 1.2 meters.
Dependencies are inferred from the claim text.